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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_RS_FILE_A3D_H
     18 #define ANDROID_RS_FILE_A3D_H
     19 
     20 #include "rsMesh.h"
     21 
     22 #include "rsStream.h"
     23 #include <stdio.h>
     24 
     25 #define A3D_MAGIC_KEY "Android3D_ff"
     26 
     27 // ---------------------------------------------------------------------------
     28 namespace android {
     29     class Asset;
     30 
     31 namespace renderscript {
     32 
     33 class FileA3D : public ObjectBase {
     34 public:
     35     FileA3D(Context *rsc);
     36     ~FileA3D();
     37 
     38     uint32_t mMajorVersion;
     39     uint32_t mMinorVersion;
     40     uint64_t mIndexOffset;
     41     uint64_t mStringTableOffset;
     42     bool mUse64BitOffsets;
     43 
     44     class A3DIndexEntry {
     45         const char *mObjectName;
     46         RsA3DClassID mType;
     47         uint64_t mOffset;
     48         uint64_t mLength;
     49         ObjectBase *mRsObj;
     50     public:
     51         friend class FileA3D;
     52         const char *getObjectName() const {
     53             return mObjectName;
     54         }
     55         RsA3DClassID getType() const {
     56             return mType;
     57         }
     58 
     59         ~A3DIndexEntry();
     60     };
     61 
     62     bool load(FILE *f);
     63     bool load(Asset *asset);
     64     bool load(const void *data, size_t length);
     65 
     66     size_t getNumIndexEntries() const;
     67     const A3DIndexEntry* getIndexEntry(size_t index) const;
     68     ObjectBase *initializeFromEntry(size_t index);
     69 
     70     void appendToFile(Context *rsc, ObjectBase *obj);
     71     bool writeFile(const char *filename);
     72 
     73     // Currently files do not get serialized,
     74     // but we need to inherit from ObjectBase for ref tracking
     75     virtual void serialize(Context *rsc, OStream *stream) const {
     76     }
     77     virtual RsA3DClassID getClassId() const {
     78         return RS_A3D_CLASS_ID_UNKNOWN;
     79     }
     80 
     81 protected:
     82 
     83     void parseHeader(IStream *headerStream);
     84 
     85     const uint8_t * mData;
     86     void * mAlloc;
     87     uint64_t mDataSize;
     88     Asset *mAsset;
     89 
     90     OStream *mWriteStream;
     91     Vector<A3DIndexEntry*> mWriteIndex;
     92 
     93     IStream *mReadStream;
     94     Vector<A3DIndexEntry*> mIndex;
     95 };
     96 
     97 
     98 }
     99 }
    100 #endif //ANDROID_RS_FILE_A3D_H
    101 
    102 
    103